Application of an inclusion complex for determination of dithianon residues in water and fruits

作者：Tian, Ting; Qiu, Fengxian^*; Dong, Ke; Yang, Dongya

来源：Toxicological and Environmental Chemistry, 2012, 94(6): 1034-1042.

DOI：10.1080/02772248.2012.689836

• beta-cyclodextrin
• inclusion complex
• dithianon
• pesticide residue
• fluorescence spectroscopy

A 3,3'-benzidine/beta-cyclodextrin fluorescence derivative (BCDFD) was prepared and characterized by means of elemental analysis and H-1 NMR. An inclusion complex was formed between BCDFD and the pesticide dithianon based on the internal cavity of beta-cyclodextrin (beta-CD), and the binding constant (K-S) of the inclusion complex was investigated. The inclusion complex could be applied for the determination of dithianon residues. Based on this, a sensitive method for the determination of dithianon was established. The linear dynamic range was from 0.63 to 12.5 mg L-1 with a correlation coefficient of 0.9927. The limit of detection for an aqueous solution of standard and the relative standard deviation (RSD) were 10.6 mu g L-1 and 0.76%, respectively. The proposed method has been successfully applied for the determination of dithianon residues in water and fruit samples with satisfactory results, and recoveries in the range of 96.0-108% were obtained. The method is rapid, direct, economical, and sensitive for dithianon analysis.

• 出版日期2012
• 单位江苏大学